Wiseco Forged Piston Kit - 420cc 4-stroke Engine
Wiseco Forged Piston Kit - 420cc 4-stroke Engine
Available in stock (4)
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Estimated delivery: Feb 04 - Feb 08
About this product
About this product
Upgrade your 4-stroke engine's performance with the Wiseco Forged Piston Kit. Designed for enthusiasts and professionals, this kit delivers superior strength and optimized performance. Built to exacting tolerances, this piston kit is the ideal choice for riders seeking improved power and reliability.
Description
The Wiseco Forged Piston Kit is engineered to maximize your 4-stroke engine's potential. Precision-forged from high-strength 2618 aluminum, this piston offers an optimized strength-to-weight ratio, ensuring durability without sacrificing performance. The ArmorGlide® skirt coating minimizes friction and wear, extending the life of both the piston and cylinder. Ideal for diverse riding conditions, this kit enhances throttle response and overall engine efficiency. With a bore size of 84.50 mm and a compression ratio of 11.0:1, this piston kit is designed for a 420cc displacement. Wiseco's dedicated forging process guarantees a piston that meets the demanding needs of high-performance engines. Installation is straightforward, providing a reliable upgrade for your engine.
Features & highlights
- Precision-forged from 2618 aluminum for superior strength and durability.
- ArmorGlide® skirt coating reduces friction and wear.
- Optimized strength-to-weight ratio enhances engine performance.
- Designed for a 420cc 4-stroke engine with an 84.50 mm bore.
- Ideal for multiple riding purposes, delivering improved throttle response.
- Kit includes piston, wrist pin, rings, and circlips for a complete installation.
- Built to tight tolerances for maximum performance and reliability.
Technical specifications
- Brand: WISECO
- Part Number: W4939M08450
- Bore Size: 84.50 mm
- Piston Diameter: 84.45 mm
- Compression Ratio: 11.0:1
- Displacement: 420 cc
- Engine Type: 4-Stroke
- Piston Material: Forged 2618 Aluminum
- Skirt Coating: ArmorGlide®
- Stroke Length: 75.00 mm
Important to know
This kit includes the piston, wrist pin, rings, and circlips. Professional installation is recommended to ensure optimal performance and longevity.
Shipping & Return
Shipping & Return
Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.
GLS home delivery costs DKK 59.
We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.
There is a 14-day return policy. Read more
Parts Denmark Info
Parts Denmark Info
Parts Denmark is a new webshop based in Denmark. We have a physical location you can visit (No showroom yet), and we have both email and phone support in our opening hours.
Our company info is:
Parts Denmark ApS
VAT: DK45974758
Dam Holme 11
3660 Stenløse, Denmark
hello@partsdenmark.com
+45 222 333 29
Best regards,
William Svendsen & Martin Høyer (Owners)
Specifications
WISECO
W4939M08450
Piston Kit
84,50 mm
11.0:1
420 cc
Forged 2618 Aluminum
75,00 mm
84.45 mm
ArmorGlide®
4-Stroke
Kit


Who is behind Parts Denmark
Martin and William are the duo behind Parts Denmark — an unlikely but awesome combo of a tech-savvy young IT wizard and a seasoned motorcycle guru who’s seen (and fixed) it all. Together, we’ve built a team with big ambitions, plenty of passion, and a shared mission to create great things — side-by-side with you.

